import java.util.Scanner;

public class Test5 {
    private static int flag = 0;
    public static void main(String[] args) {
        Thread t1 = new Thread(()->{
            while (flag == 0){

            }
            System.out.println("t1线程结束");
        });
        Thread t2 =new Thread(()->{
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入flag");
            flag = scanner.nextInt();
        });
        t1.start();
        t2.start();
    }
}
